﻿jQuery(function ($) {
    $('#demo').slideBox({
        duration: 0.3, //滚动持续时间，单位：秒
        easing: 'linear', //swing,linear//滚动特效
        delay: 5, //滚动延迟时间，单位：秒
        hideClickBar: false, //不自动隐藏点选按键
        clickBarRadius: 10
    });
});

(function ($) {
    $.fn.slideBox = function (options) {
        //默认参数
        var defaults = {
            direction: 'left',//left,top
            duration: 0.6,//unit:seconds
            easing: 'swing',//swing,linear
            delay: 3,//unit:seconds
            startIndex: 0,
            hideClickBar: true,
            clickBarRadius: 5,//unit:px
            hideBottomBar: false,
            width: null,
            height: null
        };
        var settings = $.extend(defaults, options || {});
        //计算相关数据
        var wrapper = $(this), ul = wrapper.children('ul.items'), lis = ul.find('li'),
            firstPic = lis.first().find('img');
        var li_num = lis.size(), li_height = 0, li_width = 0;
        //定义滚动顺序:ASC/DESC.ADD.JENA.201208081718
        var order_by = 'ASC';
        //初始化
        var init = function () {
            if (!wrapper.size()) return false;
            //手动设定值优先.ADD.JENA.201303141309
            li_height = settings.height ? settings.height : lis.first().height();
            li_width = settings.width ? settings.width : lis.first().width();

            wrapper.css({width: li_width + 'px', height: li_height + 'px'});
            lis.css({width: li_width + 'px', height: li_height + 'px'});//ADD.JENA.201207051027

            if (settings.direction == 'left') {
                ul.css('width', li_num * li_width + 'px');
            } else {
                ul.css('height', li_num * li_height + 'px');
            }
            ul.find('li:eq(' + settings.startIndex + ')').addClass('active');

            if (!settings.hideBottomBar) {//ADD.JENA.201208090859
                var tips = $('<div class="tips"></div>').css('opacity', 0.6).appendTo(wrapper);
                var title = $('<div class="title"></div>').html(function () {
                    var active = ul.find('li.active').find('a'), text = active.attr('title'),
                        href = active.attr('href');
                    return $('<a>').attr('href', href).text(text);
                }).appendTo(tips);
                var nums = $('<div class="nums"></div>').hide().appendTo(tips);
                lis.each(function (i, n) {
                    var a = $(n).find('a'), text = a.attr('title'), href = a.attr('href'), css = '';
                    i == settings.startIndex && (css = 'active');
                    $('<a>').attr('href', href).text(text).addClass(css).css('borderRadius', settings.clickBarRadius + 'px').mouseover(function () {
                        $(this).addClass('active').siblings().removeClass('active');
                        ul.find('li:eq(' + $(this).index() + ')').addClass('active').siblings().removeClass('active');
                        start();
                        stop();
                    }).appendTo(nums);
                });

                if (settings.hideClickBar) {//ADD.JENA.201206300847
                    tips.hover(function () {
                        nums.animate({top: '0px'}, 'fast');
                    }, function () {
                        nums.animate({top: tips.height() + 'px'}, 'fast');
                    });
                    nums.show().delay(2000).animate({top: tips.height() + 'px'}, 'fast');
                } else {
                    nums.show();
                }
            }

            lis.size() > 1 && start();
        }
        //开始轮播
        var start = function () {
            var active = ul.find('li.active'), active_a = active.find('a');
            var index = active.index();
            if (settings.direction == 'left') {
                offset = index * li_width * -1;
                param = {'left': offset + 'px'};
            } else {
                offset = index * li_height * -1;
                param = {'top': offset + 'px'};
            }

            wrapper.find('.nums').find('a:eq(' + index + ')').addClass('active').siblings().removeClass('active');
            wrapper.find('.title').find('a').attr('href', active_a.attr('href')).text(active_a.attr('title'));

            ul.stop().animate(param, settings.duration * 1000, settings.easing, function () {
                active.removeClass('active');
                if (order_by == 'ASC') {
                    if (active.next().size()) {
                        active.next().addClass('active');
                    } else {
                        order_by = 'DESC';
                        active.prev().addClass('active');
                    }
                } else if (order_by == 'DESC') {
                    if (active.prev().size()) {
                        active.prev().addClass('active');
                    } else {
                        order_by = 'ASC';
                        active.next().addClass('active');
                    }
                }
            });
            wrapper.data('timeid', window.setTimeout(start, settings.delay * 1000));
        };
        //停止轮播
        var stop = function () {
            window.clearTimeout(wrapper.data('timeid'));
        };
        //鼠标经过事件
        wrapper.hover(function () {
            stop();
        }, function () {
            wrapper.data('timeid', window.setTimeout(start, settings.delay * 1000));//ADD.JENA.201303141309
        });
        //首张图片加载完毕后执行初始化
        var imgLoader = new Image();
        imgLoader.onload = function () {
            imgLoader.onload = null;
            init();
        }
        imgLoader.src = firstPic.attr('src');

    };
})(jQuery);
